Eight times in less than eight hours - this was twenty years ago, but is by far my all time record - wound up marrying the girl, too.

Well in any marathon, you have to pace yourself. I spent about five hours with my east coast fav Griffin(Griff) recently, in Greenville SC. After an initial two and a half hours or so, we took a break for a room service meal and then spent another hour or so going at it, before she left.

Griff loves to perform oral, and my guess is she could probably do it for several hours straight. As for me, I could probably receive her oral ministrations, for several hours straight ( : MfSD.

How about the shortest, such as losing it before doing it.

For women, there's a strange, and unexpected, correlation between endurance and $$$ - see below.  

Fortunately, and being miniscule, I have a quick response, and fast cycle time.  

 In Theory of Sexual Prowess  (Escort 453), pg. 169, the following equations are given:

MEN:   Duration (in seconds) = Length x Height x Partner Looks Rating x Race Index x #Viagra Pills x #of Testicles/ Expected Acts

Race Indecis:  
 White Anglo   :  1.0
 Hispanic      :  0.87
 Asian         :  0.92
 Asian (Korean :  1.34 (interesting phenomenom)
 Black         :  7.56
 Arabian       :  unknown  (the partner look rating is too difficult to monitor)

WOMEN:

DURATION (in minutes) = $$$$ x Partner Looks Rating  x (Lengthx0.1*) x vibrator velocity / #Partner Viagra Pills / #of Partner Testicles

*length of penis, clitoras, dildo

The most incredible night I have ever spent was about three years ago before starting this endeavor.  It was a guy I had been dating and the sexual tension had grown to unbelievable heights.  Seven hours later, (unbelievable stamina), I was left paralyzed from the neck down for about forty five minutes.  It was both frightening (to be left in such a vulnerable position)and the most fulfilling night I had ever spent.  I had never came so much in my whole life.   I think if he had gone on for another hour it might have killed me-lol!

Of course I was left devastated to find out that he was married    so unfortunately we never had a repeat, but if he ever left his wife and gave me a ring out of the blue, I would would be there in a heartbeat for another night like that.

Lauren

What was even more incredible is that the guy had 11 orgasms..no bull.
Funny, we were in West Virginia and he was from Pittsburgh and me from Philly...some of the best wild sex I ever had.

Shaye

In my twenties, a girlfriend challenged me one cold Boston night to see how many times I could cum. Over 6 or seven hours, with breaks for oral sex and food, I came 13 times.

Nowadays, I like to do a good 45 minutes with my girlfriend (my last girlfriend laughed at me when it was less than an hour, calling it premature ejaculation), with her coming 2-3 times. Rinse and repeat if necessary, but I can't get by on 3 hours of sleep like I used to.

Gator Ade to avoid dehydration, but it was truly an incredible experience.

LOL!!!

About 6 years ago, my then-girlfriend and I made love 5 times a night for 3 nights in a row while out of town together.  That wasn't too bad, considering my age was 52 at the time.  Certainly not a record compared to some of the other posts on this thread, but we smiled a lot that weekend.